MTCAP3: Fix tpm2-tss-engine for new versions of openssl

Modern versions of openssl look for engine files that do not have the "lib"
prefix. The current tpm2-tss-engine recipe provides a symlink from "tpm2tss.so"
to "libtpm2tss.so" in the "-dev" package. Adding "-dev" packages to the image
is not an option (increases the image size by more than 20 MiB) and the
"-engines" package does not provide the required symlink.

Provide the symlink in "tpm2-tss-engine-engines" so it can be used in the image
instead of "tpm2-tss-engine-dev".

1 files changed, 18 insertions, 0 deletions

diff --git a/recipes-tpm2/tpm2-tss/tpm2-tss-engine_1.0.1.bbappend b/recipes-tpm2/tpm2-tss/tpm2-tss-engine_1.0.1.bbappend
new file mode 100644
index 0000000..5bdbb4a
--- /dev/null
+++ b/recipes-tpm2/tpm2-tss/tpm2-tss-engine_1.0.1.bbappend
@@ -0,0 +1,18 @@
+# Openssl since 1.1.0 looks for the engine files **without** the "lib" prefix,
+# so add a symlink from "tpm2tss.so" to "libtpm2tss.so".
+# More info:
+# - https://github.com/tpm2-software/tpm2-tss-engine/issues/6#issuecomment-422489744
+# - https://github.com/openssl/openssl/commit/9ee0ed3de66678a15db126d10b3e4226e835b8f5
+# - https://bugzilla.yoctoproject.org/show_bug.cgi?id=14776
+# - https://lists.yoctoproject.org/g/yocto/message/47921
+
+# Remove tpm2tss.so from the "-dev" package, include it to "-engines" instead.
+# The "-dev" package depends on "-engines" anyway.
+FILES_${PN}-dev = "${includedir}/*"
+FILES_${PN}-engines_append = " ${libdir}/engines-1.1/tpm2tss.so"
+
+# Allow the symlink from tpm2tss.so to libtpm2tss.so in "-engines".
+INSANE_SKIP_${PN}-engines += "dev-so"
+
+# Customized in mLinux.
+PR = "m0"